Tecsun PL-368 Manual page 20

The picture on the right shows the starting
screen that is briefly displayed when
entering the ETM memory for SW. In this
example, "E20" indicates that the current
listening time is between 20:00 and 20:59,
whereas "
during this time-range the device found 136 broadcasting frequencies.
Tips:
Time-specific ETM memories are based on the clock time of the radio.
Before initiating an ETM scan, make sure to set the time accurately.
If no previous ETM scan has been done for a specific time-range, the
ETM memory will not show any stations.
For example, the figure on the right
indicates that no ETM scan has been
performed during the 9:00-9:59 hour
time-range.
For LW/MW: The internal ferrite antenna is directional, you may need to
adjust the position of the device or use the external ferrite bar antenna
to improve ETM results. Due to the nature of radio wave propagation,
longwave and medium wave reception is generally better at night than
during the day.
For SW: Radio signal propagation depends on the condition of the
ionosphere, which itself is affected by a variety of factors (time of day,
season of the year, sunspot cycles, etc.).
For better ETM results, try to adjust the length of the whip antenna for
FM and SW reception, or rotate the radio or the external ferrite bar
antenna for better reception of MW and LW. Alternatively, try to find a
different location within the building and preferably near a window.
Electromagnetic interference (EMI) from household appliances, as well
as the location within a building, affects ETM results.
" indicates that the last time an ETM scan was done
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